v106r2p6 release LCG deps fix

ReleaseNotes/lhcb-v106r2p6.md

-2022-05-31 Geant4 v106r2p6
-===
-This release is based on `GEANT4 r10.6.2`, uses `LCG 101` and `Geant4Files v106r1`.
-
-This is the first release with rewritten CMake configuration.
-
-This version is released in single-threaded mode.
-
-
-## Latest Changes
-
-#### General
-**[MR !79] CMake configuration modernisation
-**[MR !83] Workaround for LHCb compilation flags override
-**[MR !84] Disable chatty compilation warnings

lhcbproject.yml

+---
+name: Geant4
+dependencies:
+  - LCG